Re: [RFC] sleepy linux

["H. Peter Anvin" <hpa@zytor.com>]

Oliver Neukum wrote:
> Am Mittwoch, 26. Dezember 2007 19:56:59 schrieb H. Peter Anvin:
>>> 3) Network card that is either down
>>>    or can wake up system on any packet (and not loose too many packets)
>>>
>> This is the big crux I see.  You're going to constantly wake up the 
>> machine due to broadcast packets, and spend a lot of power just going in 
>> and out of S3.
> 
> How many machines care a lot about saving power while they are connected
> to an ethernet? Wlan might be more of a problem.

A lot of them should.  An inordinate amount of machines sit there 
burning power for no reason.  You can argue that S3 isn't needed -- that 
nohz + C3/C4 + turning off the screen would be enough, and that might be 
legit.  Heck, I'm constantly frustrated by every distro upgrade breaking 
power management for my monitor.

	-hpa